USCF player statistics

Sommerstein, Adrian Harrison

USCF 30575100New YorkUpdated: Oct 2026

Official US Chess record

Gender: Male
FIDE: FIDE 39952274
US Chess reported rank: #1,944 national · #228 in state
Floor: Regular 1,800 · Quick 1,700 · Blitz 1,600

US Chess record as of Sep 15, 2026

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Regular rating

2,090+39 since Sep 2026

Published rating · Oct 2026 · 11 published updates since Dec 2025

Oct 20262,090 Regular

Compare format

Dec 2025Oct 2026

11 updates in this window · +93 first to last · open points are provisional · guides mark US Chess classes · unpublished months are skipped, not inactivity

Compare with another playerOverlays their published ratings on the chart; the link keeps the comparison.

Other formats against Regular

-222 Quick vs Regular
Typical for 2,000–2,099 regular players: -142 (middle half -228 to -82, 1,051 established members). This gap is within the typical range.
-260 Blitz vs Regular
Typical for 2,000–2,099 regular players: -217 (middle half -323 to -104, 703 established members). This gap is within the typical range.

How this rating moves

Between consecutive published observations, provisional included.

Biggest gain: +91; Aug 2026 to Sep 2026
Biggest drop: -71; Apr 2026 to May 2026
Longest rise: 3 updates; +78 from Jan 2026 to Apr 2026
Updates that moved: 10 of 10; Latest +39, Sep 2026 to Oct 2026
Typical move: ±36; Mean absolute change; spread ±48.8

Regular rating in context

Oct 2026 update

United States

#1,971of 82,596 rated members · higher than 97.6%

80,614 lower · 12 same rating · 1,970 higher · ties share a rank

New York

#235of 9,044 rated members · higher than 97.3%

8,808 lower · 2 same rating · 234 higher · ties share a rank

Where this rating sits · United States

82,596 rated members in 50-point bands · median 800–849 · 2,232 within 100 points of 2,090 (this player included)

Player · 2,090

01,4502,900

2,050–2,099: 527 members (0.6%) · highlighted band is the player’s · dashed line is the target

Target 2,100

97.7% below 2,100 (80,711 of 82,596; 97.6% below 2,090)

Percentile over time · United States

97.6% higher than · Oct 2026 · rank #1,971 of 82,596

Since Dec 2025
+1.7 pts

Dec 2025Oct 2026

Each month against that month’s active pool, so pool growth and rating drift both count.

How these comparisons are calculated

Chess67 calculations from the Oct 2026 monthly rating update, using the same population as the USCF statistics pages: US members classified as active in the published monthly records, excluding lifetime-coded records, provisional ratings included. Ties share a rank; “lower” is strictly lower; national and state groups overlap. The target explorer keeps the population fixed, with this player at their recorded rating: it is a rating comparison, not a prediction of future rank.

United States statistics New York statistics

Published ratings by month

P marks a provisional rating; the small figure is the change since the previous published observation.

Monthly USCF ratings for Sommerstein, Adrian Harrison
Month	Regular	Quick	Blitz
Oct 2026	2,090+39	1,868-50	1,830no change
Sep 2026	2,051+91	1,918+7	1,830-14
Aug 2026	1,960-4	1,911+15	1,844-7
Jul 2026	1,964-2	1,896no change	1,851-11
Jun 2026	1,966+20	1,896+20	1,862+136
May 2026	1,946-71	1,876no change	1,726-39
Apr 2026	2,017+16	1,876+18	1,765+96
Mar 2026	2,001+58	1,858-1	1,669+63
Feb 2026	1,943+4	1,859-2	1,606-12
Jan 2026	1,939-58	1,861no change	1,618no change
Dec 2025	1,997	1,861	1,618

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